superscalar.hpp

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/*
Copyright (c) 2018-2019, tevador <tevador@gmail.com>

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      names of its contributors may be used to endorse or promote products
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#pragma once

#include <cstdint>
#include <vector>
#include "superscalar_program.hpp"
#include "blake2_generator.hpp"

namespace randomx {
                                                  //                  Intel Ivy Bridge reference
    enum class SuperscalarInstructionType {       //uOPs (decode)   execution ports         latency       code size
        ISUB_R = 0,                               //1               p015                    1               3 (sub)
        IXOR_R = 1,                               //1               p015                    1               3 (xor)
        IADD_RS = 2,                              //1               p01                     1               4 (lea)
        IMUL_R = 3,                               //1               p1                      3               4 (imul)
        IROR_C = 4,                               //1               p05                     1               4 (ror)
        IADD_C7 = 5,                              //1               p015                    1               7 (add)
        IXOR_C7 = 6,                              //1               p015                    1               7 (xor)
        IADD_C8 = 7,                              //1+0             p015                    1               7+1 (add+nop)
        IXOR_C8 = 8,                              //1+0             p015                    1               7+1 (xor+nop)
        IADD_C9 = 9,                              //1+0             p015                    1               7+2 (add+nop)
        IXOR_C9 = 10,                             //1+0             p015                    1               7+2 (xor+nop)
        IMULH_R = 11,                             //1+2+1           0+(p1,p5)+0             3               3+3+3 (mov+mul+mov)
        ISMULH_R = 12,                            //1+2+1           0+(p1,p5)+0             3               3+3+3 (mov+imul+mov)
        IMUL_RCP = 13,                            //1+1             p015+p1                 4              10+4   (mov+imul)

        COUNT = 14,
        INVALID = -1
    };

    void generateSuperscalar(SuperscalarProgram& prog, Blake2Generator& gen);
    void executeSuperscalar(uint64_t(&r)[8], SuperscalarProgram& prog, std::vector<uint64_t> *reciprocals = nullptr);
}